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Outline
The dual-plate (or multi-layered) system, first suggested by Whipple in 1940', is a possible means of protecting spacecraft from micrometeoroid impacts. Dual plate armor consists of an outer (bumper) plate, a space, and an inner (catcher) plate. In this work, the bumper plates were SiC ceramic matrix composite reinforced with 3-D braiding fabric (3DBC/SiC) plates, which were comminuted at hypervelocity impacting, resulting in smaller fragments in debris clouds and less damage on catcher plates. Pure aluminum plates and LY12 aluminum plates were also used as bumper plates. But both of them couldn't comminute the projectile and caused severely damage on catcher plates. It is shown that 3DBC/SiC is an ideal material for protecting spacecraft.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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